paulinocicero

first of all, i'm sorry for my crappy english, cause i'm brazilian

i've just bought a new computer with this specs:

MB asus p4p800-e deluxe
p4 3.0E HT
MSI fx5700-vt2dr 256MB
2X512MB ddr pc3200 (400MHz) kington
tv capture PlayTV Ultra
HD 80GB SATA seagate
DVD-RW LG 4120
creative sound blaster live! 5.1

I'm not overclocking anythng

Now, this is my problem:

It seem to run just fine in windows end normal things

But when i play games (any game), it starts normal, but after a white the computer hangs, and everything stops responding
n the screen turns black

I can only shut down the computer by pressing and holdind for a while de shutdown button
with the reboot button nothing happens

Can anypne help me, please ??

Thanks in advance

Paulino Cicero